Leave A74 at Junction 15 for the A70 (signpost for Moffat/Beattock). Follow the signposts for Dumfries. Stay on the A701 for approx 16 miles, turn right following the signs for Ae village and forest. Follow organisers signs from here.
The surface will be soft underfoot with some grass areas. Not an entirely flat trail, mushers should be reasonably fit.